ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver

XCVR (Audio Transceiver) is a on-chip functional module found
on i.MX8MP. It support HDMI2.1 eARC, HDMI1.4 ARC and SPDIF.
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/20201013121733.83684-2-viorel.suman@oss.nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/Kconfig

@@ -95,6 +95,16 @@ config SND_SOC_FSL_EASRC
 	  destination sample rate. It is a new design module compare with the
 	  old ASRC.
 
+config SND_SOC_FSL_XCVR
+	tristate "NXP Audio Transceiver (XCVR) module support"
+	select REGMAP_MMIO
+	select SND_SOC_IMX_PCM_DMA if SND_IMX_SOC != n
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	  Say Y if you want to add Audio Transceiver (XCVR) support for NXP
+	  iMX CPUs. XCVR is a digital module that supports HDMI2.1 eARC,
+	  HDMI1.4 ARC and SPDIF.
+
 config SND_SOC_FSL_UTILS
 	tristate
 

sound/soc/fsl/Makefile

@@ -25,6 +25,7 @@ snd-soc-fsl-utils-objs := fsl_utils.o
 snd-soc-fsl-dma-objs := fsl_dma.o
 snd-soc-fsl-mqs-objs := fsl_mqs.o
 snd-soc-fsl-easrc-objs := fsl_easrc.o
+snd-soc-fsl-xcvr-objs := fsl_xcvr.o
 
 obj-$(CONFIG_SND_SOC_FSL_AUDMIX) += snd-soc-fsl-audmix.o
 obj-$(CONFIG_SND_SOC_FSL_ASOC_CARD) += snd-soc-fsl-asoc-card.o
@@ -38,6 +39,7 @@ obj-$(CONFIG_SND_SOC_FSL_UTILS) += snd-soc-fsl-utils.o
 obj-$(CONFIG_SND_SOC_FSL_MQS) += snd-soc-fsl-mqs.o
 obj-$(CONFIG_SND_SOC_FSL_EASRC) += snd-soc-fsl-easrc.o
 obj-$(CONFIG_SND_SOC_POWERPC_DMA) += snd-soc-fsl-dma.o
+obj-$(CONFIG_SND_SOC_FSL_XCVR) += snd-soc-fsl-xcvr.o
 
 # MPC5200 Platform Support
 obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o